Writing instrument



FIG. 1 is a front elevational view of a writing instrument of the present invention;

FIG. 2 is a right side elevational view, the left side being a mirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a front perspective view with the writing tip being projected outward and the eraser member being extended. 

The ornamental design for a writing instrument, as shown and described. 